Schools, sporting events, residential areas, business offices, hotels, restaurants, and places of worship should increase their security and U.S. citizens should be extremely careful both in the U.S. and abroad.

“The Department of State has issued this Worldwide Caution to update information on the continuing threat of terrorist actions and violence against U.S. citizens and interests throughout the world. U.S. citizens are reminded to maintain a high level of vigilance and to take appropriate steps to increase their security awareness.”